VGleaks was almost spot on with the PS4 specs except 4gb GDDR5 where wrong.
I think the Xbox720 documents are genuine and circulated months around the net. They came from an Australian hacker (the one who tried to sell devkits on ebay) his house was raided the pics of the devkits are real the rumors about the 720 very likely true.
Also all of this is old information and resurfaced from time to time in snippets all over the net for the last couple of months.
Vgleaks is credible as far as rumors go. With that I mean they don't lie all the Information comes from sources if those sources lie or not can not be said for sure. Info could be right outdated or wrong like all rumors but aslong as its from vgleaks it likely has some truth to it or was truth at some point. Meaning vgleaks rumors are worthy to talk about but its wrong to consider them a fact.







